Ti-Alloying Effect on Crystallization Behavior of Zr 72.5 Al 10 Fe 17.5 Metallic Glass

To develop metallic glass composites for practical applications, modulating the crystallization behavior of metallic glasses is an effective and important avenue, as confirmed by previous literature. Here, an obvious change in the crystallization behavior of Zr 72.5 Al 10 Fe 17.5 metallic glass was demonstrated with a minor mount of Ti dopant. Specifically, when a low concentration of Ti (even as low as 0.5 at %) was doped into the Zr 72.5 Al 10 Fe 17.5 base alloy, the originally single crystallization event, corresponding to the formation of α-Zr, Zr 6 Al 2 Fe, and FeZr 2 phases, distinctly separated into two events, Zr 6 Al 2 Fe and α-Zr + FeZr 2 . As the Ti dopant concentration increased to x = 4.0, the primary phase of the Zr 6 Al 2 Fe seems to be exchanged with the α-Zr phase, accompanied by the crystallization interval of the two crystallization events gradually increasing, even up to 110 K at x = 4.0. This change in the separated crystallization event and the interval of the currently studied alloys were determined to be associated with their solidification process and the activation energy of each crystallization event.